578813952

Appears in sequences

• a(n) = 2^(n-2)*binomial(n+1,2).at n=21A052482
• Sequence associated with a(n) = 2*a(n-1) + k*(k+2)*a(n-2).at n=22A080929
• Lexicographically earliest sequence such that (i) the binary plot of the sequence is symmetric with respect to the line y=x and (ii) the derived sequence (A000265(a(n))) contains only distinct terms.at n=28A240972
• a(1)= 2. For n > 1, a(n) is the least number k such that k, k - a(n-1) and k + a(n-1) all have n prime divisors counted by multiplicity.at n=24A365852
• Expansion of e.g.f. cosh(x)^2*(x+x^2/2).at n=24A385601